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Pensions and Other Postretirement Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2013
Pensions and Other Postretirement Benefit Plans [Abstract]  
Schedule of Net Periodic Benefit Plan Cost

The composition of the net periodic benefit plan cost for the six months ended June 30, 2013 and 2012 was as follows:

    Pension plans     Other postretirement benefits
(in thousands)   2013     2012     2013     2012  
                         
Components of net periodic benefit cost:                        
Service cost   $1,684     $1,699     $571     $536  
Interest cost   4,000     7,589     1,604     1,844  
Expected return on assets   (4,068 )   (7,184 )   -     -  
Amortization of prior service cost/(credit)   17     17     (1,834 )   (1,834 )
Amortization of transition obligation   34     37     -     -  
Amortization of net actuarial loss   1,571     2,839     1,757     1,608  
Settlement   -     119,735     -     -  
Net periodic benefit cost   $3,238     $124,732     $2,098     $2,154